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A356049
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Symmetric array read by antidiagonals: T(n,k) is the number of legal positions in Go on an n X k board.
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2
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1, 5, 5, 15, 57, 15, 41, 489, 489, 41, 113, 4125, 12675, 4125, 113, 313, 35117, 321689, 321689, 35117, 313, 867, 299681, 8180343, 24318165, 8180343, 299681, 867, 2401, 2557605, 208144601, 1840058693, 1840058693, 208144601, 2557605, 2401
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OFFSET
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1,2
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COMMENTS
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A Go position is a grid containing white and black stones with the condition that every orthogonally connected group of stones of a single color has liberties, i.e., is orthogonally adjacent to an empty cell.
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LINKS
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EXAMPLE
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Array begins:
1, 5, 15, 41, ...
5, 57, 489, ...
15, 489, ...
41, ...
...
T(3,1) = 15 from
... ..w ..b .w. .ww .b. .bb w.. w.w w.b ww. b.. b.w b.b bb.
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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